20217122 has 8 divisors (see below), whose sum is σ = 30435996. Its totient is φ = 10071792.

The previous prime is 20217103. The next prime is 20217137. The reversal of 20217122 is 22171202.

It can be written as a sum of positive squares in 2 ways, for example, as 15928081 + 4289041 = 3991^2 + 2071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20217122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17693 + ... + 18800.

Almost surely, 2^20217122 is an apocalyptic number.

20217122 is a deficient number, since it is larger than the sum of its proper divisors (10218874).

20217122 is a wasteful number, since it uses less digits than its factorization.

20217122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36772.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20217122 is about 4496.3454048816. The cubic root of 20217122 is about 272.4204947194.

Adding to 20217122 its reverse (22171202), we get a palindrome (42388324).

The spelling of 20217122 in words is "twenty million, two hundred seventeen thousand, one hundred twenty-two".